Just sold e92 m3 6MT,thinking to replace ISF or C63,test drive the C63,build quility and looks i Dont like(i only do like the exhaust sound of C63),ISF bulid qulity i think is much better M3 or C63,i do feel on straight-line ISF pull bit faster(maybe more tq?)than M3......in the end i deicede to wait for newer ISF or M3........Not fan of Mbenz...